- 1. LLNL-PRES-654659This work was performed under the auspices
of theU.S. Department of Energy by Lawrence LivermoreNational
Laboratory under contract DE-AC52-07NA27344.Lawrence Livermore
National Security, LLCEric Duoss, Engineer
2. Defense/Aerospace Sporting/Consumer Goods
Packaging/Transportation Dampen shock and vibrations Distribute and
relieve stress Maintain relative positioning Mitigate the effect of
size variationLawrence Livermore National Laboratory
LLNL-PRES-654659 2 3. 1. Difficult to control mechanical
properties2.Exhibit non-uniform properties3. Little control over
directional properties4.Difficult to develop predictive
modelsLawrence Livermore National Laboratory LLNL-PRES-654659 3 4.
Additive Manufacturing enables the ability to pattern cellular
materialswith controlled, complex architectures. We use a 3D
printing process calledDirect Ink Writing to produce ordered,
cellular elastomers.1. Enable better control of mechanical
properties2. Exhibit more uniform properties3. Enable better
control over directional properties4. Enable a predictive modeling
capabilityLawrence Livermore National Laboratory LLNL-PRES-654659 4
5. Lawrence Livermore National Laboratory LLNL-PRES-654659 5 6.
Face centered tetragonal (FCT)Uniaxial compressionSimple cubic
(SC)Pre-compression + shearLawrence Livermore National Laboratory
LLNL-PRES-654659 6 7. Same base elastomer material Same volume
fraction (ordegree of porosity) = ~50% Different printed
architectureLawrence Livermore National Laboratory LLNL-PRES-654659
7 8. 0% Simple cubic 500 mm 9. 5% Simple cubic 500 mm 10. 10%
Simple cubic 500 mm 11. 15% Simple cubic 500 mm 12. 20% Simple
cubic 500 mm 13. 25% Simple cubic 500 mm 14. 0% Face centered
tetragonal 500 mm 15. 5% Face centered tetragonal 500 mm 16. 10%
Face centered tetragonal 500 mm 17. 15% Face centered tetragonal
500 mm 18. 20% Face centered tetragonal 500 mm 19. 25% Face
centered tetragonal 500 mm 20. Same base elastomer material Same
volume fraction (ordegree of porosity) = ~50% Different printed
architectureLawrence Livermore National Laboratory LLNL-PRES-654659
20 21. FCT structure pre-compressed (25%) and sheared (dynamic
strain sweep)Lawrence Livermore National Laboratory
LLNL-PRES-654659 22. SC structure pre-compressed (25%) and sheared
(dynamic strain sweep)Lawrence Livermore National Laboratory
LLNL-PRES-654659 22 23. Lawrence Livermore National Laboratory
LLNL-PRES-654659 23 24. Lawrence Livermore National Laboratory
LLNL-PRES-654659 24 25. Existing prototypepatent applications filed
Currently being scaled up for production Ready for
commercialization New designs possible to achieve new
performancefor new market applicationsLawrence Livermore National
Laboratory LLNL-PRES-65465925 26. Charity
[email protected] Livermore National Laboratory
LLNL-PRES-654659 26